不知其详

Explanation: He does not know the details. 　　Usage: Verb-object type; for the predicate; that do not know the details of his 　　Source: Qing Wu Jingzi "Scholars" 44 back: "Shi Yu Shi family, and I have a little smell, I do not know the details." 　　Examples: Shi Yu Shi family, and I have a little smell, ~. (Qing Wu Jingzi "Scholars" Forty-fourth back)